Temperature detection and control

Abstract

A print component integrated circuitry package includes a number of temperature sensors where each of the plurality of the temperature sensors is disposed in a corresponding temperature region of an integrated circuitry. In an example, an analog sense bus conductively connects to all of the plurality of temperature sensors and an external sensor pad that is to connect to a corresponding print controller contact.

What is claimed is: 
     
       1. A replaceable print head cartridge, comprising:
 an integrated circuitry having a print head die with an array of nozzles to discharge ink; 
 a plurality of temperature sensors disposed in a plurality of temperature regions of the integrated circuitry and selectable via one or more selection bits; 
 a plurality of heating elements disposed in the plurality of temperature regions of the integrated circuitry, wherein at least one of the plurality of temperature sensors is located between at least one of the array of nozzles and at least one of the plurality of heating elements, wherein a difference between a first distance value, between the at least one of the plurality of temperature sensors and the at least one of the array of nozzles, and a second distance value, between the at least one of the plurality of heating elements and the at least one of the array of nozzles, is within a threshold range of values; 
 an analog sense bus conductively connected to all of the temperature sensors; 
 a print controller contact; and 
 a single external sensor pad conductively connecting the bus to the contact to multiplex responses from the temperature sensors received on the bus. 
 
     
     
       2. The print head cartridge of  claim 1 , wherein the integrated circuitry comprises:
 a first print head die and a second print head die each having an array of nozzles to discharge ink; and 
 a first temperature sensor of the plurality of temperature sensors is located on the first print head die and a second temperature sensor of the plurality of temperature sensors is located on the second print head die. 
 
     
     
       3. The print head cartridge of  claim 1 , wherein the integrated circuitry comprises:
 a first print head die having an array of nozzles to discharge a first color ink; 
 a second print head die having an array of nozzles to discharge a second color ink; and 
 a first temperature sensor of the plurality of temperature sensors located on the first print head die and a second temperature sensor of the plurality of temperature sensors is located on the second print head die. 
 
     
     
       4. The print head cartridge of  claim 1 , wherein the bus is a single analog bus shared by all of the temperature sensors. 
     
     
       5. The print head cartridge of  claim 4 , wherein the temperature sensors provide a signal one after the other along the single analog sense bus to the single external sensor pad without repeating until each of the temperatures sensors has provided the signal. 
     
     
       6. The print head cartridge of  claim 1 , wherein the temperature sensors return a signal to the single external sensor pad in response to an instruction for the cartridge to print. 
     
     
       7. The print head cartridge of  claim 1 , wherein the single external sensor pad multiplexes signals between the temperature sensors and the contact at a frequency of an integrated circuit print rate divided by a number of the temperature sensors. 
     
     
       8. The print head cartridge of  claim 1 , wherein:
 the print head die includes an end region adjacent to the array of nozzles; 
 a heating element on the end region; and 
 at least one of the temperature sensors is located on the end region between the array of nozzles and the heating element in a direction lengthwise along the die. 
 
     
     
       9. The print head cartridge of  claim 1 , comprising a control register and wherein each temperature sensor is selected by changing a corresponding bit value in the control register. 
     
     
       10. A replaceable print head cartridge, comprising:
 an integrated circuitry having a print head die with an array of nozzles to discharge ink; 
 a plurality of temperature sensors disposed in a plurality of temperature regions of the integrated circuitry and selectable via one or more selection bits; 
 a plurality of heating elements disposed in the plurality of temperature regions of the integrated circuitry, wherein at least one of the plurality of temperature sensors is located between at least one of the array of nozzles and at least one of the plurality of heating elements, wherein a difference between a first distance value, between the at least one of the plurality of temperature sensors and the at least one of the array of nozzles, and a second distance value, between the at least one of the plurality of heating elements and the at least one of the array of nozzles, is within a threshold range of values; 
 a single analog sense bus conductively connected to all of the temperature sensors; 
 a print controller contact; and 
 a single external sensor pad conductively connecting the single analog bus to the contact, wherein the temperature sensors provide a signal one after the other along the single analog sense bus to the single external sensor pad without repeating until each of the temperatures sensors has provided the signal. 
 
     
     
       11. The print head cartridge of  claim 10 , wherein the single external sensor pad multiplexes responses from the temperature sensors received on the single analog bus. 
     
     
       12. The print head cartridge of  claim 11 , wherein the temperature sensors return a signal to the single external sensor pad in response to an instruction for the cartridge to print. 
     
     
       13. The print head cartridge of  claim 12 , wherein the integrated circuitry comprises:
 a first print head die and a second print head die each having an array of nozzles to discharge ink; and 
 a first temperature sensor of the plurality of temperature sensors is located on the first print head die and a second temperature sensor of the plurality of temperature sensors is located on the second print head die. 
 
     
     
       14. The print head cartridge of  claim 12 , wherein the integrated circuitry comprises:
 a first print head die having an array of nozzles to discharge a first color ink; 
 a second print head die having an array of nozzles to discharge a second color ink; and 
 a first temperature sensor of the plurality of temperature sensors is located on the first print head die and a second temperature sensor of the plurality of temperature sensors is located on the second print head die. 
 
     
     
       15. A replaceable print head cartridge, comprising:
 an integrated circuitry having a print head die with an array of nozzles to discharge ink; 
 a plurality of temperature sensors disposed in a plurality of temperature regions of the integrated circuitry; 
 a plurality of heating elements disposed in the plurality of temperature regions of the integrated circuitry, wherein at least one of the plurality of temperature sensors is located between at least one of the array of nozzles and at least one of the plurality of heating elements, wherein a difference between a first distance value, between the at least one of the plurality of temperature sensors and the at least one of the array of nozzles, and a second distance value, between the at least one of the plurality of heating elements and the at least one of the array of nozzles, is within a threshold range of values; 
 a single analog sense bus conductively connected to all of the temperature sensors; 
 a print controller contact; and 
 a single external sensor pad conductively connecting the bus to the contact to multiplex responses from the temperature sensors received on the bus and wherein the temperature sensors provide a signal one after the other along the single analog sense bus to the single external sensor pad without repeating until each of the temperatures sensors has provided the signal. 
 
     
     
       16. The print head cartridge of  claim 15 , wherein the integrated circuitry comprises:
 a first print head die and a second print head die each having an array of nozzles to discharge ink; and 
 a first temperature sensor of the plurality of temperature sensors is located on the first print head die and a second temperature sensor of the plurality of temperature sensors is located on the second print head die. 
 
     
     
       17. The print head cartridge of  claim 16 , wherein the integrated circuitry comprises:
 a first print head die having an array of nozzles to discharge a first color ink; 
 a second print head die having an array of nozzles to discharge a second color ink; and 
 a first temperature sensor of the plurality of temperature sensors is located on the first print head die and a second temperature sensor of the plurality of temperature sensors is located on the second print head die.